185 lines
6.2 KiB
C
185 lines
6.2 KiB
C
/*
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* Copyright © 2009 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include "main/mtypes.h"
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#include "prog_instruction.h"
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#include "program_parser.h"
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/**
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* Extra assembly-level parser routines
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*
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* \author Ian Romanick <ian.d.romanick@intel.com>
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*/
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int
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_mesa_parse_instruction_suffix(const struct asm_parser_state *state,
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const char *suffix,
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struct prog_instruction *inst)
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{
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inst->Saturate = GL_FALSE;
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/* The only possible suffix element is the saturation selector from
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* ARB_fragment_program.
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*/
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if (state->mode == ARB_fragment) {
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if (strcmp(suffix, "_SAT") == 0) {
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inst->Saturate = GL_TRUE;
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suffix += 4;
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}
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}
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/* It is an error for all of the suffix string not to be consumed.
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*/
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return suffix[0] == '\0';
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}
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int
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_mesa_ARBvp_parse_option(struct asm_parser_state *state, const char *option)
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{
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if (strcmp(option, "ARB_position_invariant") == 0) {
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state->option.PositionInvariant = 1;
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return 1;
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}
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return 0;
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}
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int
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_mesa_ARBfp_parse_option(struct asm_parser_state *state, const char *option)
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{
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unsigned fog_option;
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/* All of the options currently supported start with "ARB_". The code is
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* currently structured with nested if-statements because eventually options
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* that start with "NV_" will be supported. This structure will result in
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* less churn when those options are added.
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*/
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if (strncmp(option, "ARB_", 4) == 0) {
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/* Advance the pointer past the "ARB_" prefix.
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*/
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option += 4;
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if (strncmp(option, "fog_", 4) == 0) {
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option += 4;
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if (strcmp(option, "exp") == 0) {
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fog_option = OPTION_FOG_EXP;
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} else if (strcmp(option, "exp2") == 0) {
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fog_option = OPTION_FOG_EXP2;
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} else if (strcmp(option, "linear") == 0) {
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fog_option = OPTION_FOG_LINEAR;
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} else {
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/* invalid option */
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return 0;
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}
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if (state->option.Fog == OPTION_NONE) {
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state->option.Fog = fog_option;
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return 1;
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}
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/* The ARB_fragment_program specification instructs us to handle
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* redundant options in two seemingly contradictory ways:
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*
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* Section 3.11.4.5.1 says:
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* "Only one fog application option may be specified by any given
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* fragment program. A fragment program that specifies more than one
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* of the program options "ARB_fog_exp", "ARB_fog_exp2", and
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* "ARB_fog_linear", will fail to load."
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*
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* Issue 27 says:
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* "The three mandatory options are ARB_fog_exp, ARB_fog_exp2, and
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* ARB_fog_linear. As these options are mutually exclusive by
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* nature, specifying more than one is not useful. If more than one
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* is specified, the last one encountered in the <optionSequence>
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* will be the one to actually modify the execution environment."
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*
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* We choose to allow programs to specify the same OPTION redundantly,
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* but fail to load programs that specify contradictory options.
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*/
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return state->option.Fog == fog_option ? 1 : 0;
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} else if (strncmp(option, "precision_hint_", 15) == 0) {
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option += 15;
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/* The ARB_fragment_program spec, 3.11.4.5.2 says:
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*
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* "Only one precision control option may be specified by any given
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* fragment program. A fragment program that specifies both the
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* "ARB_precision_hint_fastest" and "ARB_precision_hint_nicest"
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* program options will fail to load.
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*/
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if (strcmp(option, "nicest") == 0 &&
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state->option.PrecisionHint != OPTION_FASTEST) {
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state->option.PrecisionHint = OPTION_NICEST;
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return 1;
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} else if (strcmp(option, "fastest") == 0 &&
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state->option.PrecisionHint != OPTION_NICEST) {
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state->option.PrecisionHint = OPTION_FASTEST;
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return 1;
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}
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return 0;
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} else if (strcmp(option, "draw_buffers") == 0) {
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/* Don't need to check extension availability because all Mesa-based
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* drivers support GL_ARB_draw_buffers.
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*/
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state->option.DrawBuffers = 1;
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return 1;
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} else if (strcmp(option, "fragment_program_shadow") == 0) {
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if (state->ctx->Extensions.ARB_fragment_program_shadow) {
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state->option.Shadow = 1;
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return 1;
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}
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} else if (strncmp(option, "fragment_coord_", 15) == 0) {
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option += 15;
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if (state->ctx->Extensions.ARB_fragment_coord_conventions) {
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if (strcmp(option, "origin_upper_left") == 0) {
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state->option.OriginUpperLeft = 1;
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return 1;
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}
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else if (strcmp(option, "pixel_center_integer") == 0) {
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state->option.PixelCenterInteger = 1;
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return 1;
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}
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}
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}
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} else if (strncmp(option, "ATI_", 4) == 0) {
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option += 4;
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if (strcmp(option, "draw_buffers") == 0) {
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/* Don't need to check extension availability because all Mesa-based
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* drivers support GL_ATI_draw_buffers.
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*/
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state->option.DrawBuffers = 1;
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return 1;
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}
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}
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return 0;
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}
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